package org.jparrow.framework.util;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 * @author supda
 * @Date 2017-3-24 ����1:22:45
 *  �����ļ�������
 */
public final class PropsUtil {
 
	private static final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);
	
	/**
	 * ���������ļ�
	 */
	
	public static Properties loadProps(String fileName){
		Properties properties = null;
		
		InputStream is = null;
		
		try{
			is = Thread.currentThread().getContextClassLoader()
					.getResourceAsStream(fileName);
			if(is == null)
				throw new FileNotFoundException(fileName+" file is not found");
			
			properties = new Properties();
			properties.load(is);
		}catch(Exception e){
			LOGGER.error("load properties file failure", e);
		}finally{
			if(is != null){
				try{
					is.close();
				}catch(IOException e){
					LOGGER.error("close input stream failure", e);
				}
			}
		}
		
		return properties;
	}
	
	/**
	 * ��ȡ�ַ������ԣ�Ĭ��ֵΪ�յ��ַ�
	 */
	public static String getString(Properties properties, String key){
		return getString(properties, key,"");
	}

	/**
	 * ��ȡ�ַ����ԣ���ָ��Ĭ��ֵ��
	 */
	public static String getString(Properties properties, String key,
			String defaultValue) {
		
		String value = defaultValue;
		
		if(properties.containsKey(key)){
			value = properties.getProperty(key);
		}
		
		return value;
	}
	
	/**
	 * ��ȡ��ֵ�����ԣ�Ĭ����ֵΪ0��
	 */
	public static int getInt(Properties props , String key){
		return getInt(props, key, 0);
	}

	/**
	 * ��ȡ��ֵ�����ԣ�Ĭ����ֵΪ0��
	 */
	private static int getInt(Properties props, String key, int defaultValue) {
		int value = defaultValue;
		
		if(props .containsKey(key)){
			value = CastUtil.castInt(props.getProperty(key));
		}
		return value;
	}
	
	/**
	 *��ȡ���������ԣ�Ĭ��ֵΪfalse�� 
	 */
	public static boolean getBoolean(Properties props , String key){
		return getBoolean(props, key , false);
	}

	/**
	 *��ȡ���������ԣ�Ĭ��ֵΪfalse�� 
	 */
	private static boolean getBoolean(Properties props, String key, boolean defaultValue) {
		boolean value = defaultValue;
		if(props.containsKey(key)){
			value = CastUtil.castBoolean(props.getProperty(key));
		}
		return value;
	}
	
	
}
